CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY AND NONCONTROLLING INTERESTS - USD ($) $ in Millions	Total	Common stock Common Class A	Common stock Common Class B	Common stock Exchangeable Class A	Common stock Exchangeable Class B	Paid-in capital	Retained earnings	Accumulated other comprehensive income (loss)	Common stock held in treasury Class B	Noncontrolling interest	[1]
Beginning balance at Dec. 31, 2021	$ 13,664.1	$ 0.0	$ 2.1	$ 102.2	$ 417.8	$ 6,970.9	$ 7,401.5	$ (1,006.0)	$ (471.4)	$ 247.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exchange of shares					(0.6)	0.6
Shares issued under equity compensation plan	(3.4)					(3.4)
Amortization of share-based compensation	25.7					25.7
Purchase of noncontrolling interest	(1.4)					0.3				(1.7)
Net income (loss) including noncontrolling interests	403.3						415.2			(11.9)
Other comprehensive income (loss), net of tax	(400.5)							(396.5)		(4.0)
Share repurchase program	(38.8)								(38.8)
Contributions from noncontrolling interests	8.1									8.1
Distributions and dividends to noncontrolling interests	(11.3)									(11.3)
Dividends declared	(249.3)						(249.3)
Ending balance at Sep. 30, 2022	13,396.5	0.0	2.1	102.2	417.2	6,994.1	7,567.4	(1,402.5)	(510.2)	226.2
Beginning balance at Jun. 30, 2022	13,602.8	0.0	2.1	102.2	417.2	6,984.1	7,433.8	(1,069.0)	(497.6)	230.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares issued under equity compensation plan	1.0					1.0
Amortization of share-based compensation	8.8					8.8
Purchase of noncontrolling interest	0.1					0.2				(0.1)
Net income (loss) including noncontrolling interests	218.1						216.4			1.7
Other comprehensive income (loss), net of tax	(335.5)							(333.5)		(2.0)
Share repurchase program	(12.6)								(12.6)
Contributions from noncontrolling interests	0.8									0.8
Distributions and dividends to noncontrolling interests	(4.2)									(4.2)
Dividends declared	(82.8)						(82.8)
Ending balance at Sep. 30, 2022	13,396.5	0.0	2.1	102.2	417.2	6,994.1	7,567.4	(1,402.5)	(510.2)	226.2
Beginning balance at Dec. 31, 2022	12,915.2	0.0	2.1	102.2	413.3	7,006.4	6,894.1	(1,205.5)	(522.9)	225.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exchange of shares				(1.4)	(57.3)	58.7
Shares issued under equity compensation plan	0.6					0.6
Amortization of share-based compensation	34.1					34.1
Deconsolidation of VIE	(8.8)									(8.8)
Net income (loss) including noncontrolling interests	851.2						845.6			5.6
Other comprehensive income (loss), net of tax	7.0							6.9		0.1
Share repurchase program	(61.2)								(61.2)
Share repurchase program	(60.9)
Contributions from noncontrolling interests	2.4									2.4
Distributions and dividends to noncontrolling interests	(11.0)									(11.0)
Dividends declared	(269.7)						(269.7)
Ending balance at Sep. 30, 2023	13,459.8	0.0	2.1	100.8	356.0	7,099.8	7,470.0	(1,198.6)	(584.1)	213.8
Beginning balance at Jun. 30, 2023	13,256.9	0.0	2.1	102.2	380.7	7,059.5	7,129.3	(1,093.4)	(549.6)	226.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exchange of shares				(1.4)	(24.7)	26.1
Shares issued under equity compensation plan	0.4					0.4
Amortization of share-based compensation	13.8					13.8
Deconsolidation of VIE	(8.8)									(8.8)
Net income (loss) including noncontrolling interests	431.9						430.7			1.2
Other comprehensive income (loss), net of tax	(105.9)							(105.2)		(0.7)
Share repurchase program	(34.5)								(34.5)
Share repurchase program	(34.2)
Distributions and dividends to noncontrolling interests	(4.0)									(4.0)
Dividends declared	(90.0)						(90.0)
Ending balance at Sep. 30, 2023	$ 13,459.8	$ 0.0	$ 2.1	$ 100.8	$ 356.0	$ 7,099.8	$ 7,470.0	$ (1,198.6)	$ (584.1)	$ 213.8

[1] All activity included in the noncontrolling interests column of the condensed consolidated statements of stockholder's equity and noncontrolling interests excludes activity from our redeemable noncontrolling interest.